Two-for-one stop motion



J. v. KEITH ETAL I TWO-FOR-ONE STOP MOTION Original Filed Nov. l6, 1953 June 16, 1959 4 Sheets-Sheet l NQ mm on 8 no No 3 R R mu 3 o 4 '2 O O K. v u .ws 8s 9w w m 9 Q (a JNVENTOR. JOHN M KEITH- BY KENNETH D. KIRKMAN A T TORNE Y J. v. KEITH ETYAL TWO-F'ORONE STOP MOTION June 16, 1959 4 Sheets-Sheiet .2

( jriginal Filed Nov] 16, 1953 INVENTOR. JOHN V KEITH BY KENNETH D. K/RKMAN A T TORNE Y June 1959 J. v. KEITH ETAL 2,890, 6

TWO-FORONE STOP MOTION Original Filed Nov. 16,1953 4 Sheets-Shet s INVENTOR. JOHN M KEITH BY KENNETH D. K/PKMAN ATTORNEY.

J1me 9 U J; v. KEITH ETAL 2,89

TWO-FOR-ONE STOP MOTION 4 Sheets-Sheet 4 Original Filed Nov. 16, 195sv W: PQ 5 .2: 2 9t q: H as wt 1w QQ QQN. NQ bow .Q g Q 94 m Q .8 v m bkx I N$ m5 +2 QQ t2 Nb\ INVENTOR- JOHN V KEITH BY KENNETH DK/RKMAN ATTORNEY I United States Patent fiice Two-FoR-oNE sror MOTION John V. Keith, Warwick, and Kenneth D. Kirkman, Norwood, R.I., assignors to Universal Winding Company, Cranston, R.I., a corporation of Massachusetts 2 Claims. (Cl. 5789) The present invention relates to .a machine for twisting and winding a strand of yarn, and more particularly pertains to such a machine having means for stopping the winding mechanism and the twisting mechanism upon the breakage or exhaustion of the strand of yarn being operated upon and is a division of our copending application Serial No. 392,328, filed November 16, 1953, now Patent No. 2,786,324.

In the following specification and claims the term yarn is employed in a general sense to apply to all kinds of strand materials, either textile or otherwise, and the designation package is intended to mean the product of the winding machine whatever its form.

A customary operation in the textile indutry is to impart twist to a strand of yarn by rotating a spindle carrying a supply of yarn, drawing the yarn from said supply and winding the yarn thus twisted into a package by means of a winding mechanism. In recent years, multiple twist spindles have been employed in this operation in constantly increasing numbers. It is recognized by those skilled in the art that multiple twist spindles possess advantages over the more conventional single twist spindles inasmuch as their use permits a strand of yarn to be twisted twice as fast as it can be twisted on a single twist spindle. However, a major disadvantage inherent in multiple twist spindles is the fact that the supply of yarn carried thereby tends to feed out of the spindle, under the action of centrifugal force, and wind resistance in the event the strand breaks between the spindle and the winding mechanism. The constantly feeding broken strand of yarn, which is rapidly rotated by the spindle, beats against adjacent parts of the mechanism and is thus broken into small fragments which contaminate yarn being twisted by adjacent spindles and which enter moving parts of the machinery to damage the same.

Attempts have been made in the past to provide mul tiple twist spindles with yarn trapping devices designed to permit the strand of yarn being twisted to pass through the spindle so long as said strand remained unbroken, but adapted upon breakage of the strand to catch and hold it to prevent the above described feeding thereof. Many of these devices did not function in the manner intended, or if they did function they had to be changed or adjusted each time a different diameter yarn was twisted by the spindle.

- It is accordingly one object of the present invention to provide a mechanism for preventing a broken strand of yarn from feeding from a multiple twist spindle.

Another object of the present invention is to provide a mechanism for stopping the operation of a multiple twist spindle upon breakage or exhaustion of the strand of yarn being twisted.

Another object of the present invention is to provide a twisting and winding machine wherein breakage or exhaustion of the strand of yarn being twisted and wound will cause the winding portion of said mechanism to Patented June 16,1959

become inoperative and wherein the action of said winding portion in assuming its inoperative position will cause the twisting portion thereof to become inoperative.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the apparatus possessing the construction, combination of elements and arrangement of parts which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the followingv detailed description taken in connection with the accom-- panying drawings wherein:

Fig. 1 is a front elevation of a mechanism embodying: the present invention;

Fig. 2 is a side elevation corresponding to Fig. 1;

Fig. 3 is an enlarged fragmentary side elevation showing the twisting spindle of Figs. 1 and 2 in operative position and showing the mechanism for disconnecting and stopping said spindle;

Fig. 4 1s a view similar to Fig. 3 but showing the twisting spindle in its inoperative position;

Fig. 5 is an enlarged fragmentary front elevation showing the mechanism for stopping the operation of the winding portion of the machine;

Fig. 6 is a view similar to Fig. 5 but showing the stopping mechanism in its tripped position;

Fig. 7 is a front elevation of a machine embodying a modified form of the present invention;

Fig. 8 is a side elevation corresponding to Fig. 7; and

Fig. 9 is a perspective view of the brake member.

The present invention relates to a machine for twisting and winding a strand of yarn, said machine having one portion thereof comprising a twisting spindle and another portion thereof comprising a winding unit. The winding unit is provided with a knock-off or stop motion adapted to move a portion of the winding unit to place that unit in a stopped or inoperative condition when the strand of yarn being twisted and wound breaks or is exhausted. The Winding unit and the twisting spindle are interconnected so that operation of said stop motion causes the twisting spindle to be disconnected from its driving means and a brake to be applied to the spindle to stop its rotation.

The present drawings illustrate one unit of 'a gang machine comprising a plurality of winding units and twisting spindles all substantially identical and all adapted to be driven from a common source of power. However, it should be understood that each unit can be individually driven if desired and need not be gang mouted.

Referring now'to Figs. 1 through 6 of the drawings wherein there is disclosed one form of the present invention. The winding unit employed in the modification of Figs. 1 through 6 is similar to the winding unit disclosed in the co-pending application for United States Letters Patent Serial No. 222,807, filed April 25, 1951, by J. V. Keith, for Twisting and Winding Machine, now Patent No. 2,769,299. Therefore, only so much of the winding mechanism as is necessary for a complete understanding of the present invention will be described herein. The twisting spindle disclosed in the modification of Figs. 1 through 6 is similar to the multiple twist spindle disclosed in U.S. Patents Nos. 2,478,926 and 2,478,928, issued August 16, 1949, to C. B. Kingsbury and R. H. Carter et al. respectively, therefore only so much of these spindles will be described herein as is necessaryfor ported by legs 14. A traverse mechanism, not shown, to

. getherwith spindle 16 are journaled in housing 10 and are driven by a source of power located adjacent one end of the machine, all in the manner explained in the above mentioned application Serial No. 222,807. A shaft 18 is journaled in housing 10 with one of its ends projecting from the front of said housing and carries thereon star wheel 20. Shaft 18 and star wheel 20 are rotated in a clockwise direction as viewed in Figs. 5 and 6 by the same source of power which operates spindle 16. A shaft 22, is iournaled in housing 10 with one of its ends projecting from the front thereof and is manually rockable by means of handle 24. The inner end of shaft 22 is connected to a clutch, not shown, for coupling the yarn traversing mechanism, spindle 16 and shaft 18 to their driving source of power when said shaft is rocked in a clockwise direction as viewed in Figs. 1, 5 and 6 and for disengaging said clutch when said shaft is rocked in a counterclockwise direction.

A spring, not shown, located inside of housing 10 resiliently urges shaft 22 in a counterclockwise direction and means are provided for holding said shaft against counterclockwise rotation while a strand of yarn is being wound. An elbow-shaped lever 26 is rigidly attached to shaft 22 adjacent the front surface of housing 10 and has its left hand end bifurcated to form two fingers. One of these fingers is bent rearwardly at right angles to lever 26 to form a latch shoulder 28, see Fig. 6, the other finger is bent forwardly at its tip to form breakage lever engaging lug 30. A generally triangular latch keeper member 32 is pivoted at one apex of the triangle on stud 34 secured to the front wall of housing 18 and located beneath spindle 16. The uppermost edge of keeper lever 32 is provided with a rearwardly bent shoulder or flange 36 which is adapted to cooperate with latch shoulder 28 to maintain elbow-shaped lever 26 in its raised or clutch engaging position. Latch keeper member 32 is spring urged in a clockwise direction by means of spiral spring 38 which encircles stud 34 and has one of its ends attached to a bolt 40 secured in the face of housing 10 and its other end engaging the lowermost edge of keeper member 32. Elbow-shaped lever 26 and latch keeper are so proportioned that when they are in an unlatched or disengaged position, the bottom of latch shoulder 28 engages the upper surface of flange 36 on keeper member 32 and restrains it against further clockwise rotation under the influence of spring 38. It will thus be seen that as starting lever 24 is swung in a clockwise direction from the position illustrated in Fig. 6, to the position illustrated in Fig. 5, the bottom surface of latch shoulder 28 will slide along the upper surface of shoulder or flange 36, to cam latch keeper member 32 in a counterclockwise direction against the action of spring 38 until such time as latch shoulder 28 passes beyond latch or flange 36. When shoulder 28 passes beyond shoulder 36, spring 38 immediately moves latch keeper member 32 in a clockwise direction until stop lug 42, which forms a second apex of triangular latch keeper 32 engages the under surface of latch shoulder 28. This brings the left hand edge of shoulder or flange 36-opposite the right hand edge of latch shoulder 28 to effectively prevent elbow-shaped lever 26from returning to its clutch disengaging position. A breakage lever 44 pivoted intermediate its ends to the third apex of latch keeper member 32 is adapted tov disengage shoulderor flange 36 from latch shoulder 28 upon the breakage or exhaustion of yarn being wound to permit elbow-shaped lever 26 to swing in a counterclockwise direction to the position illustrated in. Fig. 6, to stop the rotation of spindle 16 and the operation of the yarn guide. Breakage lever 44 is generally Y-shaped and is pivoted adjacent the junction of its upper arms 46 and 48-,to latch keeper member 32, by means of a suitable stud 50. The upper end of left hand arm 46 of breakage lever 44.is bent over to form a star wheel engaging abutment 52. The upper end of right hand arm 48 of break.-

a ssunter c n we gh P rmit saidbreaka age lever 44 is provided with a pin or stud 54 adapted to 28 from shoulder or flange 36.

lever to be balanced so that it can be controlled by any given yarn tension. The lower end of breakage lever 44 is provided with a forwardly extending yarn engaging bar 56 adapted to engage the strand of yarn being wound on spindle 16 to maintain breakage lever 44 in the position illustrated in Fig. 5, whereby star wheel engaging abutment 52 is held away from and out of engagement with said star wheel. Upon breakage or exhaustion of the winding strand of yarn the restraint on breakage lever 44 is removed and said lever pivots from the posi tion illustrated in Fig. 5, to move its star wheel engaging abutment 52 into engagement with star wheel 20, whereupon it is struck an impelling blow by said star wheel. The blow on abutment 52 moves breakage lever 44 downwardly to thereby pivot latch keeper member 32 in a counterclockwise direction to release the latch shoulder Immediately upon the separation of shoulders 28 and 36, elbow-shaped lever 26 rotates in a counterclockwise direction to the positions illustrated in Fig. 6 thus releasing the clutch inside of housing 10. As elbow-shaped lever 26 swings in its counterclockwise movement, forwardly extending breakage lever engaging lug 38 on said elbow-shaped lever, contacts the edge of upper arm 46 of breakage lever 42 thereby rotating said breakage lever and star wheel engaging abutment 52 located thereon, out of the path of star wheel 20. Elbow-shaped lever 26 is provided with an extension 58 which functions to start and stop the twister spindle in a manner to be explained more fully hereinafter.

As stated above, the multiple twist spindle disclosed in Figs. 1 through 4, is generally similar to the spindle disclosed in US. Patent No. 2,478,926 and the manner of mounting the multiple twist spindle is generally similar to the spindle mounting and latch-out device disclosed in US. Patent No. 2,478,928. The multiple twist spindle 60 comprises a spindle 62 rotatably journaled in a spindle bolster 64 that is secured by any convenient means adjacent one end of L-shaped arm 66. L-shaped arm 66 is pivoted adjacent its uppermost end to bed 12 by means of shaft 68 pivotally secured to said bed by means of bracket members 70. A whorl 72 and disc-like flyer 74 are fixedly secured to spindle 62. The weight of multiple twist spindle 60, augmented by spring 76, to be explained more in detail hereinafter, tends to pivot L- shaped arm 66 rearwardly to bring whorl 72 into contact with spindle driving belt 78 which extends in a generally horizontal plane along the front of the mechanism. Belt 78 is driven by any convenient source of power located adjacent one end of the machine. Contact of whorl 72 with belt 78 rotates spindle 62 and disc-like flyer 74 in the manner old and well known in the art. A plurality of spaced idler pulleys 80 are carried by a horizontal rail 82 in back of belt 78 to guide said belt and to apply a force opposing the thrust of whorl 72. Horizontal rail 82 is secured to legs 14 by means of brackets 84.

The upper portion of spindle 62 is provided with an axial bore which connects with radial bore 86 formed in flyer 74 to provide a yarn passage in the manner common in multiple twist spindles. Flyer 74 is provided with an annular flange 75 located above the opening of bore 86. A holder 88 for carrying a package of untwisted yarn 90 is journaled on spindle 62 in the manner disclosed in said Patent No. 2,478,926. A tension device 92 is carried by yarn package 90. Multiple twist spindle 60 operates to have a strand of yarn drawn from package 90, pass through tension device 92, pass down wardly through the bore in spindle 62 and out radial bore 86 in flyer 74. As the yarn passes out flyer 74, it is drawn upwardly through guide 94, carried by bed 12 and axially aligned with spindle 62, between yarn engaging bar 56 and fixed bar 57 and onto winding spindle 16.

A spindle latch-out device of the type disclosed in the above mentioned Patent No. 2,478,928 is mounted. on Lrshaped arm 66. The latch-out device comprisesaz bent ster 64. A weight wire 96 hingedly secured to arm 66 adjacent spindle bol- 98 is secured to one end of wire 96 to pivot said wire to bring its Opposite end up to engage horizontal rail 82 to hold whorl 72 away from belt 78, all in the manner set forth in said Patent No. 2,478,928, in the event arm 66 is moved a sufiicient distance.

A vertical link 100 has its upper end pivotally connected to the end of extension 58 of elbow-shaped lever 26. The lower end of link 100 is pivotally secured to the end of forwardly extending lever 102 which is fixedly connected to shaft 68. A second lever 104 is fixedly secured to shaft 68 and extends rearwardly therefrom. A second link 106 is pivotally attached adjacent its upper end to the end of lever 104 and is slidably journaled adjacent its lower end in bracket 108 carried by horizontal rail 82. A cam plate 110 having a cam surface 112 is secured to the lower end of link 106. A cam following roller 114 is carried by stud 116 on arm 66 to engage cam surface 112. Spring 76 having one of its ends connected to bent over ear 118 on cam plate 110 and its other end connected to stud 116 maintains said roller 111 and cam surface 112 in engagement. It will, therefore, be seen that counterclockwise movement of shaft 22 to stop the winding operation will lift extension 58 and link 100, and that link 100 will in turn lift lever 102 to rotate shaft 68. Rotation of shaft 68 will lower lever 104 and link 106 to cause cam surface 112 to react against cam follower 114 and to move L-shaped arm 66 to remove whorl 72 from engagement with belt 78. Downward movement of cam plate 110 in the above described manner does not move L-shaped arm 66 far enough to permit wire 96 to engage the edge of horizontal rail 82. Therefore, when shaft 22 is rotated in a clockwise direction the movement of extension 58, link 100, levers 102 and 104, and link 106 will lift cam plate 110 to permit arm 66 to swing rearwardly to again engage whorl 72 and belt 78.

A brake 120, preferably formed from sheet metal, is pivotally mounted on L-shaped arm 66 adjacent flyer 74. Brake 120 comprises two generally parallel arms 122 and 124, Fig. 9, connected together at one end by web portion 126. A finger 128 extends from brake arm 122 in opposition to web 126. A brake pade 130, preferably formed from felt or leather, is secured to web 126 by any convenient means. Arms 122 and 124 straddle L-shaped arm 66 and are pivotally journaled thereon by means of binge pin 132 secured thereto and which passes through aligned openings in said brake arms. Brake 120 is resiliently urged to rotate in a clockwise direction, as viewed in Figs. 3 and 4, by means of a hairpin type spring 134 which encircles pin 132 and engages arm 66 with one of its ends and arm 124 with its other so that when it is free to rotate brake pad 130 will engage the under side of flange 75. A stud 136 is positioned on link 106 to engage brake finger 128 when said link 106 is moved to its upward position to pivot brake 120 in a counterclockwise direction and to remove brake pad 130 from contact with flyer flange 75.

The above described apparatus operates in the following manner. A package of untwisted yarn 90 is placed in holder 88 of multiple twist spindle 60. The end of the strand wound on package 90 is threaded through tension device 92, through the bore of spindle 62 out radial bore 86 and upwardly through guide 94 and secured to a package core carried by winding spindle 16. Handle 24 is pivoted in a clockwise direction to start the operation of the winding mechanism and to engage latch shoulder 28 and keeper shoulder or flange 36 to hold handle 24 and shaft 22 in their operative position. Movement of handle 24 in a clockwise direction also moves extension 58 of elbow-shaped lever 26 downwardly to thereby rnove link 100 downwardly and through the intervention of levers 102 and 104 move link 106 uprotating star wheel 20,

shaft 22 will lift extension .wardly. Upward movement of link 106 raises cam plate 110 and permits the weight of multiple twist spindle 60 and spring 76 to swing L-shaped arm 66 and said multipletwist spindle rearwardly until whorl 72 engages driving belt 78. Upward movement of link 106 will also cause stud 136 to engage finger 128 and swing brake pad 130 away from flange 75 of flyer 74 to provide suflicient space therebetween for the strand of yarn Y to pass through. With the apparatus in this condition spindle 62 will rotate to swing a loop of yarn around the supply package 90, in the manner well known in the art, to impart two turns of twist thereinto for every rotation of said spindle. Winding spindle 16 will rotate to draw the strand of yarn upwardly and towind it into a package.

In the event the strand of yarn being twisted breaks, the absence of a running strand of yarn contacting bar 56 will permit breakage lever 44 to pivot in a counterclockwise direction, as viewed in Fig. 5, to bring its abutment 52 beneath one of the projections formed on whereupon said star wheel will drive said breakage lever and latch keeper member 32 downwardly to disengage latch shoulder 28 from keeper shoulder 36 whereupon its spring Will rotate shaft 22 in a counterclockwise direction to stop the operation of the winding mechanism. counterclockwise rotation of 58 to lift link and lower link 106. As link 106 moves downwardly, cam surface 112 on cam plate will force cam follower 114 outwardly and with it, L-shaped arm 66 and multiple twist spindle 60 to thereby disengage whorl 72 from driving belt 78. Downward movement of link 106 will also move stud 136 away from brake finger 128 permitting spring 134 to pivot brake pad upwardly into engagement with flyer flange 75 to stop the rotation of said flyer and spindle 62 to thereby prevent yarn from being fed out of radial bore 86 due to centrifugal force. It will be noted that the outer curved edge of brake pad 130 is positioned close to the periphery of flyer 74 when said pad is in engagement with flange 75. Therefore, as said brake pad brings the flyer to a stop, the tail of yarn extending from radial bore 86 will engage said pad and will be wrapped thereby around the periphery of said flyer and thus be held against entanglement With belt 78.

The modified form of the present invention disclosed in Figs. 7 and 8 comprises a multiple twist spindle mounted on the bed 142 of a twisting machine by means of a spindle swing 144 of the type disclosed in U.S. Patent No. 2,648,948, issued August 18, 1953, to D. G. Soussloff et al. Spindle swing 144 includes a bracket portion 146 secured to bed 142 and having pivotally mounted thereon spindle carrying arm 148. A spring, not shown, is located in bracket portion 146 and is connected to arm 148 to resiliently urge said arm rearwardly as viewed in Fig. 7, and to the left as viewed in Fig. 8. Spindle 140 is resiliently secured in arm 148 by means of a vibration isolating mounting member 150 of the type disclosed in U.S. Patent No. 2,668,087, issued February 2, 1954, to D. G. Soussloff et al.

Multiple twist spindle 140 is similar to the multiple twist spindle disclosed in application for U.S. Letters Patent Serial No. 383,263 for Twister Spindle, filed September 30, 1953, by I. V. Keith, now Patent No. 2,785,- 526, but, it will be understood that any of the prior art belt driven multiple twist spindles adapted for vertical operation, can be employed in its stead. Multiple twist spindle 140 is provided with a spindle blade, not shown herein, which has whorl 152 and flyer 154 fixed thereon. The spindle blade is rotatably journaled in spindle step 156 which in turn is secured in vibration isolating mounting 150. A belt 158, conventional in uptwisting machines and driven by a source of power located adjacent the end of the machine, is positioned adjacent whorl 152 and 'is adapted to be engaged by said whorl upon rearward pivotal movement of arm 148 to thereby rotate said whorl, the spindle blade and flyer 154. Forward pivot movement of arm 148 disengages whorl 152 from belt 158 and brings said whorl into engagement with fixed brake 160, carried by bracket 146, to stop the rotation of the spindle, whorl and flyer. Flyer 154 is a disc-like member secured to the spindle blade adjacent whorl 152 and is provided with a radial passage 162 which connects with an axial passage in the upper end of the spindle blade in the manner old and well known in the art and which is fully described in said above mentioned application Serial No. 383,263, to provide a passageway for the yarn being twisted by the spindle. Support means 164 are carried by the spindle blade for holding a supply of yarn to be twisted. A permanent magnet 166 is carried by an upstanding arm 168 and cooperates with a second magnet, not shown, carried by support means 164 to prevent rotation of said support means with the spindle blade. The lower end of arm 168 is secured to bracket member 170 which in turn is secured to spindle step 156 by having said step pass through a hole formed therein and being clamped between the lower end of vibration isolating mounting member 150 and the nut 172 which clamps said spindle step in the vibration isolating mounting member. A balloon restraining ring 174 is also supported by upstanding arm 168 and encircles yarn supply support means 164.

Means are provided for winding the strand of yarn Y after it has been twisted by multiple twist spindle 140 and for disengaging the winding mechanism and moving spindle 140 to its inoperative position in the event the strand of yarn being twisted should break. A driving drum 176 is rotated by shaft 178, in the manner common to uptwisters, it being understood that shaft 178 is suitably journaled in the end frames, not shown, of the twisting machine and is rotated by the main driving mechanism of the machine in a manner well known to those skilled in the art. A bobbin hanger 180, preferably of the type disclosed in US. Patent No. 2,743,063, issued April 24, 1956, to D. G. Soussloif et al., for Stop-Motions for Winding and Like Machine, is secured to a longitudinally extending bar 182, carried by the twister end frames, in such a position that a bobbin or spool 184 carried by said bobbin hanger can contact drum 176 with its barrel or the yarn wound thereon, all in a manner old and well known to those skilled in the art. Bobbin hanger 180 is also provided with a stop motion device, also specifically described in the above mentioned US. Patent No. 2,743,063, to lift said bobbin hanger to raise the winding package carried thereby from driving drum 176 when the strand of yarn is broken or exhausted. The

7 movement, imparted by said stop stop motion mechanism includes an oscillating shaft 186 carrying a finger 138 which is-rocked up and down by said shaft 186 adjacent a hook 190. Hook 190 is carried by bobbin hanger 180 in such fashion that when it engages finger 188' said finger pulls it downwardly to pivot said bobbinhanger upwardly. Hook 190 is held retracted from the path of oscillating finger 188 by means of. a counterbalanced breakage lever 192, theend of which is engaged and held in a lowered position by the twisted running strand of yarn Y as it passes from spindle 140 over horizontal guide bar 194 and on to bobbin 184. It will be understood that a conventional reciprocating yarn guide is interposed between guide bar 194 and bobbin or spool 184 toguide the running strand of yarn along said bobbin or spool. Saidreciprocating'yarn guide is omitted from the drawing inasmuch as it forms no part of the present invention and is not necessary to a complete understanding: thereof.. In the. event strand of. yarn Y breaks, breakage lever: 192i is. permitted to rise and in so rising causes hook 190 to-move into the path of oscillating finger .188 whereupon said. finger. pulls saidhook downwardly to lift bobbin hanger 180 and remove bobbin frames of the twister.

184 from contact with driving roll 176. The specific details of the construction and operation of the bobbin hanger and stop motion are explained in detail in the above mentioned US. Patent No. 2,743,063-

A link 196 is pivotally connected, at its upper end, to one arm of bobbin hanger 180 by means of hinge memher 198 secured to said arm. The lower end of link 196 is slidably received in aligned holes formed in U-shaped fitting 200. Fitting 200 is pivotally connected to arm 202 of bell-crank lever 204 which in turn is pivotally mounted on horizontal shaft 206. Shaft 206 may be mounted on brackets secured to bed 142 or can be secured to the end The second arm 208 of bellcrank lever 204 is attached at its lower-most end to one end of horizontal rod 210. Rod 210 is supported adjacent its free end for sliding movement by means of a slot-ted hanger 212 secured to the edge of bed 142 to position said free end of said rod 210 closely adjacent spindle carrying arm 148. The lower end of link 196 has a stop member 214 threadedly mounted thereon and spaced from U-shaped fitting .200 a suflicient distance so that link 196 can slide through fitting 200 as said link moves upwardly with bobbin hanger 180 in response to the growth of the package of yarn being wound on bobbin 184. When the stop motion functions, it lifts bobbin hanger 180.higher than it is lifted by the growth of the winding package, therefore, stop member 214 is positioned close enough to U-shaped fitting 200 so that the additional motion, will cause it to engage said fitting 200 and rotate bell-crank lever 204 in a counterclockwise direction, as viewed in Fig. 8. Such movement of the bell-crank lever causes its arm 208 to slide horizontal rod 210 to the right bringing its free end i into engagement with spindle carrying arm 148 to swing said arm and spindle outwardly to thereby disengage spindle whorl 152 from driving belt 158 and press it against brake 160. A torsion spring can be provided around shaft 236 to tend to rotate bell-crank lever 204 in a clockwise direction to normally retain horizontal rod 210 in its retracted position, or the spring present in spindle carrying bracket 146, which functions to press whorl 152 against belt 158, can be made strong enough to perform that function.

The modification of Figs. 7 and 8 functions in the following manner. Spindle 140 is threaded in the customary manner and the strand of yarn Y is drawn upwardly through stationary yarn guide 216 over guide bar 194 and breakage lever 192 and attached to bobbin or spool 184-. Bobbin hanger is then lowered to bringsaid bobbin or spool into driving engagement with driving drum 17 6 to rotate said bobbin to wind strand of yarn Y thereon. Lowering bobbin hanger 180' also moves link 196 downwardly thus moving stop member 214 away from U-shaped fitting 200 to permit bell-crank lever 204 to rotate in a clockwise direction thereby moving horizontal rod 210 inwardly and permitting spindle carrying arm 148 and spindle 140 to pivot inwardly to engage spindle whorl 152 against belt 158.

In the event strand Y breaks; or the supply thereof is exhausted, breakage lever 192 will rise and will swing hook under oscillating finger 188 whereuponsaid finger will pull said hook downwardly to lift bobbin hanger 180 to remove the winding package from contact with driving" drum 176. Upward movement of bobbin hanger 180 will lift link 196 to bring stop member 214 into engagement with U-shaped fitting 200 torotate bellcrank lever 204 in a' counterclockwise direction. Conn terclockwise rotation of bell-crank lever 204" causes the arm 208 thereof to move horizontal rod 210 outwardly to contact its free end with spindle carrying arm 148 and to swing said arm and spindle 140outwardly to disengage whorl 152' from belt 158 and to press said whorl against brake 1 60 to stop the rotation of the spindle.

Since certain changes may be made in the above apparatus without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

We claim:

1. A machine for twisting and winding a strand of yarn comprising a rotatable spindle having a whorl, means engageable by said whorl for rotating said whorl and spindle to impart twist to a strand of yarn, a pivotally mounted support for said spindle swingable to selectively engage said whorl with said rotating means and to move said whorl out of engagement therewith, means urging said support in the direction to engage said whorl and rotating means, winding means including a pivotally mounted package supporting arm for winding yarn twisted by said spindle, a rotatable driving roll engageable by the periphery of a winding package of yarn carried by said arm to rotate said package, stop motion mechanism operable in the absence of a winding strand of yarn to pivot said arm to remove the package carried thereby from contact with said roll, a link connected to said arm and movable therewith, a rod engageable with said support and movable to swing said support against said urging means to disengage said whorl and rotating means, and a lost motion connection between said link and said rod whereby said arm can pivot due to the normal growth of the winding package without disengaging said whorl and rotating means.

2. A machine for twisting and winding a strand of yarn comprising a rotatable spindle having a whorl, means engageable by said whorl for rotating said whorl and spindle to impart twist to a strand of yarn, a pivotal- I0 ly mounted support for said spindle swingable to selectively engage said whorl with said rotating means and to move said whorl out of engagement therewith, means urging said support in the direction to engage said whorl and rotating means, winding means including a pivotally mounted package supporting arm for Winding yarn twisted by said spindle, a rotatable driving roll engageable by the periphery of a winding package of yarn carried by said arm to rotate said package, stop motion mechanism operable in the absence of a winding strand of yarn to pivot said arm to remove the package carried thereby from contact with said roll, a link connected to said arm for movement therewith, a movable rod engageable with said support upon movement in one direction to swing said support against said urging means to disengage said whorl and said rotating means, a bell-crank lever having one of its arms connected to said rod, and a lost motion coupling between said link and the second arm of said bell-crank lever whereby said arm can pivot due to the normal growth of the winding package without pivoting said bell-crank lever and whereby operation of said stop motion mechanism to remove said package from said roll causes said arm to pivot said lever in said one direction to disengage said whorl and rotating means.

References Cited in the file of this patent UNITED STATES PATENTS 2,557,783 Cochran June 19, 1951 2,574,957 Bochmann et al Nov. 13, 1951 2,584,096 Thomas Jan. 29, 1952 2,599,256 Hartley et al. June 3, 1952 

